What is the case for an effective government system according to Aristotle

In the case of a revolution, where the citizenship and constitution change, a city’s identity changes, and so it cannot be held responsible for its actions before the revolution.

Roughly speaking, there are six kinds of constitution, three just and three unjust. A constitution is just when it benefits everyone in the city and unjust when it benefits only those in power. When a single person rules, a constitution is a monarchy if the ruler is good and a tyranny if the ruler is bad. When a small elite rules, a constitution is an aristocracy if the rulers are good and an oligarchy if the rulers are bad. When the masses rule, a constitution is a polity if they rule well and a democracy if they rule badly. Aristotle acknowledges that giving full sovereignty to either the governing body or the laws might make room for abuses of power and suggests that a polity is probably least susceptible to corruption, especially when the laws are given higher authority than the governing body. He proposes a principle of distributive justice, saying that benefits should be conferred upon different citizens differently, depending on the contribution they make to the well-being of the state.